Aim of this work, is the experimental assessment of the mechanical behaviour of threaded inserts, commonly used in racing cars. Tests have been performed, both in tension and in torsion, as a function of the installation technique in composite materials. Different type of inserts have been considered to evaluate the influence of materials on the strength of the inserts. From results has been proved that the installation technique influences very little the pull through strength, whilst it mostly affects the torsion strength. In particular, the failure torque is heavily influenced whether a bonding adhesive is used or not during the insert installation. Numerical models have also been made to simulate the inserts pull-through, using the commercial code LS-Dyna®, an explicit finite element code especially used in crashworthy problems. Due to the thick composite structure, a thick shell numerical laminate has been modeled. The plies have been tied each other with a failure contact model. Numerical results show a good correlation with experimental data both in force-displacement curve and in material local damage.

Threaded inserts pull-through behaviour in carbon-epoxy thick laminates

PRATO, ALESSIA;ANGHILERI, MARCO
2017-01-01

Abstract

Aim of this work, is the experimental assessment of the mechanical behaviour of threaded inserts, commonly used in racing cars. Tests have been performed, both in tension and in torsion, as a function of the installation technique in composite materials. Different type of inserts have been considered to evaluate the influence of materials on the strength of the inserts. From results has been proved that the installation technique influences very little the pull through strength, whilst it mostly affects the torsion strength. In particular, the failure torque is heavily influenced whether a bonding adhesive is used or not during the insert installation. Numerical models have also been made to simulate the inserts pull-through, using the commercial code LS-Dyna®, an explicit finite element code especially used in crashworthy problems. Due to the thick composite structure, a thick shell numerical laminate has been modeled. The plies have been tied each other with a failure contact model. Numerical results show a good correlation with experimental data both in force-displacement curve and in material local damage.
2017
Carbon fibre, Thick laminate, Finite element analysis, Threaded insert, Pull-through test
File in questo prodotto:
File Dimensione Formato  
CARRE01-17.pdf

Accesso riservato

Descrizione: Paper
: Publisher’s version
Dimensione 3 MB
Formato Adobe PDF
3 MB Adobe PDF   Visualizza/Apri
CARRE_OA_01-17.pdf

Open Access dal 05/04/2019

Descrizione: Paper open access
: Post-Print (DRAFT o Author’s Accepted Manuscript-AAM)
Dimensione 1.18 MB
Formato Adobe PDF
1.18 MB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/1017534
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 9
  • ???jsp.display-item.citation.isi??? 9
social impact